An Ecological Study of Buckeye Lake. 91 



cenchrus oryzoides. In small depressions where the peat is still 

 distinctly wet it is covered with Heteranthera dubia, Spirodela 

 pol3^rhiza, Ceratophyllum demersum, Potamogeton foliosus and 

 Cladophora sp. One large decayed Lotus leaf covers an area of 

 i}i feet. In the margin of the islet are 2 small pools, 4 inches 

 and I foot in diameter and the surface of each bears a Spirodela 

 mat. 



The peat shelf slopes gradually to water a foot deep within 



Fig. 30. — Small peat mass which has been alternately exposed and 

 submerged during several years. In a very short time after emergence 

 it bears a varied and abundant vegetation. 



five feet of the islet, which lies in the eastern margin of an 

 extensive Nelumbo lutea society. The condition of the surface 

 of the peat indicated recent exposure, the presence of 3 year old 

 willows, that it had been in existence at least 3 years, and the 

 two together that it had undergone alternate emergence and 

 submergence. 



This islet was again examined Aug. 191 1. The vegetation had 

 changed somewhat and the area was larger, the greatest length 

 was 15 and greatest width 12 feet. On the northern end were 15. 



